Experimental Investigation on Micro Milling of Graphite in Electrical Discharge Machining Process

There is a growing demand for high-precision micro components and structures in various industries such as optics, biotechnology, aerospace, and information technology. An intellectually sound strategy for the realm of mechanical micro machining involves the pursuit of ultra-precision machines characterized by small footprints. Extensive investigations have been conducted over the course of the last two decades pertaining to the intricate process of micro milling, specifically focusing on a diverse range of engineering materials. Nevertheless, a noticeable absence can be observed within the existing body of research pertaining to the intricate process of micro milling of graphite. A scientific study is conducted to examine the machinability of graphite by micro-milling with a tungsten carbide micro tool through micro electrical discharge machining (µEDM) process. Process variables include capacitance, voltage, tool rotation speed, and feed rate. The most influential process factors for all response parameters are found to be voltage and capacitance.